City leaders issued a precautionary boil-water advisory Monday following a water main break in the city.

Officials said the break caused pressure to drop enough that there was a chance that contaminants could enter the system. Until tests can determine that the water is safe, they want customers not to ingest any tap water that hasn't been boiled for at least one minute.

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Experts advise people to dispose of any ice cubes from a household ice maker, use boiled or bottled water for drinking, cooking or teeth brushing, and to disinfect dishes by soaking them in tap water that contains a teaspoon of unscented bleach.

Officials said they expected the advisory to be in effect for at least 24 hours.